https://w3id.org/xapi/profiles/extensions/subregistration generates a 404

[imartinezortiz]

Sorry if this is not the proper location to submit this issue, but I didn't found a fork of https://github.com/perma-id/w3id.org/ in the adlnet org to submit there.

Following the review of the xAPI profile spec as part of the P9274.2.1 WG I find out that the URI https://w3id.org/xapi/profiles/extensions/subregistration generates a 404 instead of redirecting to the xAPI profile spec for further explanation (e.g. https://github.com/adlnet/xapi-profiles/blob/master/xapi-profiles-about.md#subregistration or https://github.com/adlnet/xapi-profiles/blob/master/xapi-profiles-structure.md#90-patterns)